Chair for use primarily on a boat



FIG. 1 is a front elevational view of a chair for use primarily on a boat showing my new design;

FIG. 2 is a rear elevational view;

FIG. 3 is a top plan view;

FIG. 4 is a bottom plan view;

FIG. 5 is a side elevational view, the opposite side being a mirror image thereof; and

FIG. 6 is a perspective view of the chair on an enlarged scale. 

The ornamental design for a chair for use primarily on a boat, as shown and described. 